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                XWW的难题                </h1>
                <p>时间限制：10s&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;  空间限制：128MB</p>			</div>
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                                <h3>题目描述</h3><p><p><span style="font-size: medium">XWW是个影响力很大的人，他有很多的追随者。这些追随者都想要加入XWW教成为XWW的教徒。但是这并不容易，需要通过XWW的考核。<br />
XWW给你出了这么一个难题：XWW给你一个N*N的正实数矩阵A，满足XWW性。<br />
称一个N*N的矩阵满足XWW性当且仅当：（1）A[N][N]=0；（2）矩阵中每行的最后一个元素等于该行前N-1个数的和；（3）矩阵中每列的最后一个元素等于该列前N-1个数的和。<br />
现在你要给A中的数进行取整操作（可以是上取整或者下取整），使得最后的A矩阵仍然满足XWW性。同时XWW还要求A中的元素之和尽量大。<br />
</span></p></p><hr/><h3>输入格式</h3><p><p><font size="4">第一行一个整数N,N &le; 100。<br />
接下来N行每行包含N个绝对值小于等于1000的实数，最多一位小数。<br />
</font></p></p><hr/><h3>输出格式</h3><p><p><font size="4">输出一行，即取整后A矩阵的元素之和的最大值。无解输出No。<br />
</font></p></p><hr/><h3>样例输入</h3><pre>4
3.1 6.8 7.3 17.2
9.6 2.4 0.7 12.7
3.6 1.2 6.5 11.3
16.3 10.4 14.5 0 
</pre><hr/><h3>样例输出</h3><pre>129
</pre><hr/><h3>提示</h3><p><p><span style="font-size: medium">【数据规模与约定】<br />
有10组数据，n的大小分别为10,20,30...100。<br />
【样例说明】<br />
样例中取整后满足XWW性的和最大的矩阵为：<br />
3 7 8 18<br />
10 3 0 13<br />
4 1 7 12<br />
17 11 15 0</span></p>
<p></p></p><hr/><h3>题目来源</h3><p>没有写明来源</p>
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